Lundin needed help getting off the ice after the hit. Coach Paul MacLean said Lundin had a concussion. The Flyers won the game 2-1.

Flyers coach Peter Laviolette thinks it was a clean hit.

"When you look at it, Harry didn't do anything wrong," Laviolette told reporters after the game. "When he was lining up he didn't take strides, everything was down, his arms were down. The impact just made a lot of noise. Sometimes the hits that make a lot of noise get looked at. It appeared going into the hit that everything was in check."

Discipline czar Brendan Shanahan disagreed.

"Instead of delivering a hard, legal check, he launches prior to the check making significant contact to Lundin's head. This is charging," he said in the league's video announcement of the suspension.

"In all areas of the ice players still have the responsibility to keep their heads up and expect to be checked. But what no player should expect is that his opponent will launch upward, off the ice and into his head. It's important to note that though Lundin is bracing for the hit and trying to minimize its force by stopping, he does not significantly change his position prior to this illegal check."

Zolnierczyk's elbow hit Lundin's head in the collision, the Ottawa Citizen reported. It also noted Lundin was skating with the puck and had his head down when he was KO'd.

Zolnierczyk will forfeit $12,972.96 in salary for the four-game suspension. The money goes toward the NHL’s Player Emergency Assistance Fund.

A journeyman with 43 games' experience, Zolnierczyk ducked league punishment last week after being given a misconduct penalty for apparently kneeing the Washington Capitals' Mathieu Perreault. He was kicked out of that game, and the NHL later rescinded the penalty.

Lundin was on the Senators' defense corps to help fill in for Erick Karlsson, last season's Norris Trophy winner who is out with injury.